N54 Dyno Results: AccessPORT OTS Maps + Custom Pro Tune / Panel Filter vs BMS DCI

[maperformance]

I recently picked up an E92 335i that will be used primarily as my daily driver but will see some weekend road course action. I've got access to a dyno so I figured I would do my best to document the performance gains realized with each individual modification. The data below represents the first three steps in my journey, enjoy!

Before and After Walnut Blasting: +17whp and +13wtq from a $399 maintenance service, yes please!



Post Walnut Blasting (Baseline) vs Cobb Stage 1 Sport: I was pretty impressed with the Stage 1 Sport, but who can argue with +65whp and +82wtq from just a flash?



Baseline vs Cobb Stage 1 Aggressive: Due to some knock the Stage 1 Aggressive map actually performed worse than the Stage 1 Sport. Given the fact that I was running 93 octane throughout this testing I can only assume this disparity is due to differences in either fuel or altitude in comparison to their test vehicle.



Baseline vs Custom Pro Tune: Apparently there was some power left on the table from the Stage 1 Sport OTS map which only makes sense in that every vehicle's "situation" (fuel, altitude, etc.) is different. I couldn't be happier given that we realized +73whp and +104wtq from tuning alone!



Cobb Stage 1 Sport vs Custom Pro Tune



Cobb Panel Filter vs BMS Dual Cone Intake: I had seen the BMS DCI recommended quite frequently as the intake solution of choice, so I had to try it out for myself. As you can see the vast majority of the power band is within what I would consider margin of error from run to run, thus BMW did a pretty good job with the intake from the factory! However, above ~6300rpm the BMS DCI does start to show some gains with a maximum of +11whp and +8wtq. Are these gains worth the $95, only you can make that decision!

[___whoosh___]

now that is a good post!
awesome info & thank you

[Freon]

Good stuff, thanks for taking all that data and posting.

Not too surprised on the intake test. I'd call that moot.

[Jockey]

Interesting results. I am kinda shocked post and pre walnut blasting. I am getting that done here shortly as I am approaching 45k miles.

[Donny Rino1]

I'm a little shocked that the bms intake pretty much did nothing below 6300 rpm. Kinda thinking a drop in filter would be good enough if I only do the sport map and intercooler

[Donny Rino1]

Question....why does the ' walnut dyno' lol...show you are hitting 13 psi in the lower left hand corner ?

[maperformance]

Good question I wish there was some more resolution there lol, what is stock boost pressure?

[Jockey]

Originally Posted by maperformance

Good question I wish there was some more resolution there lol, what is stock boost pressure?

I thought it was around 6-7 psi

[maperformance]

That would be odd indeed as the car was bone stock to the best of my knowledge, the power numbers aren't that far off for a stock car are they?

[Jockey]

Yeah, those numbers are pretty much in line with a stock car.

[gap]

Thanks for sharing that. How many miles of carbon buildup before the walnut blasting?

[135Pats]

Unless you're pushing a good deal of boost the intake is just not particularly relevant. People spend far too much time worrying about it.

[Adam135]

Fantastic post - thank you!

[darkrom]

Originally Posted by maperformance

Good question I wish there was some more resolution there lol, what is stock boost pressure?

8PSI. There is a 13psi map on the JB4....

So maybe the walnut blasting DOESN'T gain much power (as it really shouldn't). A couple HP sure but I'd imagine its less than the open filter.

[Freon]

I'm not very surprised at the gains of walnut blasting. I would guess it could be worse depending on how bad you are clogged.

The N54 uses a MAP sensor, so blocked valves means it will flow less air than expected given the pressure in the intake manifold. It may not be able to trim that back out well at high load, it is still less efficient, and each cylinder may not be flowing equally. When cylinders don't flow equally they can each be richer or leaner than optimal/target, thus timing cannot be optimal either. N55 still has most of those problems with a MAF, but it should have a better rough trim estimate to start. That may only be an issue on an ECU reset.

[mike@x-ph.com]

Good Post !!

[maperformance]

Originally Posted by gap

Thanks for sharing that. How many miles of carbon buildup before the walnut blasting?

Approximately 68k miles:

[stormzusmc]

Originally Posted by maperformance

Approximately 68k miles:

Hey Chris, I'll be calling you soon to get this done on the 1er.

[maperformance]

Sounds good

[maperformance]

Part II of my dyno testing has been posted here!

[maperformance]

Originally Posted by Donny Rino1

Question....why does the ' walnut dyno' lol...show you are hitting 13 psi in the lower left hand corner ?

Wanted to clarify on this as well, the graph shows -13psi as the sensor was left unhooked

[Donny Rino1]